Recently I moved from scary sharp to Shaptons. Although they cost me a
pretty penny, the Shapton 1000 stone is faster than my course diasharp
from dmt. The edge I get from the 8000 is significantly sharper than
what I ever got with 2500 grit automobile paint grade sandpaper.
They stay really flat, I am now using the diasharp to flatten the
Shaptons. I am a believer and plan to add another stone below the 1000
grit this summer.